Di-tert-butyl dicarbonate（CAS NO 24424-99-5）
Specification:
Item | Specification |
CAS NO | 24424-99-5 |
Molecular formular | C10H18O5 |
Molecular weight | 218.25 |
Linear formula | [(CH3)3COCO]2O |
EINECS NO | 246-240-1 |
State | White,low melting crystalline solid,high melting liquid |
Density（g/mL,25/4℃） | 0.95 g/mL at 25 °C(lit.) |
Melting Point（ºC） | 22-24 |
Boiling Point | 65-67 °C |
Refractive index | 1.4075-1.4095 |
Flash Point（ºC） | 37 |
Preparation:
Di-tert-butyl dicarbonate,short name is Diboc,CAS NO 24424-99-5The preparation method of di-tert-butyl dicarbonate: 1. Stir and cool the sodium tert-butoxide and n-hexane; 2. Add carbon dioxide and keep at 5-15°C; 3. Add dicarbonate or trichloromethyl chloroformate; 4. 、Insulation, control the PH value of 5~6; 5. Add water, control the temperature at 0-5℃, stir and wash until neutral; 6. Desolve under normal pressure, to 80-90℃; cool to normal temperature after desolventization; 7. Frozen crystallization; 8. Separate the crystals to dry; 9. Mix the batch, add the materials to the kettle, control the temperature of the kettle to 25~30℃, turn on the stirring, turn on the vacuum to -0.095Mpa, and finally discharge the material -5~ Store at 10°C.
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